CVE-2021-27577

Incorrect handling of url fragment leads to cache poisoning

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.

Una vulnerabilidad de manejo incorrecto de fragmentos de url de Apache Traffic Server, permite a un atacante envenenar la caché. Este problema afecta a Apache Traffic Server versiones 7.0.0 hasta 7.1.12, versiones 8.0.0 hasta 8.1.1, versiones 9.0.0 hasta 9.0.1

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-02-23 CVE Reserved
2021-06-29 CVE Published
2024-05-21 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.apache.org/thread.html/ra1a41ff92a70d25bf576d7da2590575e8ff430393a3f4a0c34de4277%40%3Cusers.trafficserver.apache.org%3E	2021-09-20
https://www.debian.org/security/2021/dsa-4957	2021-09-20

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 7.0.0 <= 7.1.12 Search vendor "Apache" for product "Traffic Server" and version " >= 7.0.0 <= 7.1.12"		-		Affected
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 8.0.0 <= 8.1.1 Search vendor "Apache" for product "Traffic Server" and version " >= 8.0.0 <= 8.1.1"		-		Affected
Apache Search vendor "Apache"		Traffic Server Search vendor "Apache" for product "Traffic Server"				>= 9.0.0 <= 9.0.1 Search vendor "Apache" for product "Traffic Server" and version " >= 9.0.0 <= 9.0.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected